File size: 3,193 Bytes
1856027 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | # Copyright 2024 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Unit tests for generative model tuning."""
# pylint: disable=protected-access,bad-continuation,g-import-not-at-top,reimported
import sys
from unittest import mock
import pytest
def test_vertexai_has_lazy_preview():
"""Tests that `vertexai.preview` works but uis lazy-loaded."""
# * Cleaning up the `vertexai` module state.
# Important: If we run this test after some other tests that import the
# `vertexai.preview` module, then Python's importing mechanism adds the
# imported module to the `vertexai` as the `preview` attribute,
# and this prevents the `__getattr__` from being called.
# So to test that `__getattr__` is actually called, we must delete that
# attribute (which might or might not exist). Note that using `hasattr`
# triggers `__getattr__`.
# Removing the `vertexai.preview` attribute.
import vertexai as vertexai1
try:
delattr(vertexai1, "preview")
except AttributeError:
pass
main_module_name = vertexai1.__name__ # == "vertexai"
preview_module_name = main_module_name + ".preview"
del vertexai1
with mock.patch.dict(sys.modules):
# First we must remove the cached modules.
# Otherwise, importing a module is a no-op.
# https://docs.python.org/3/reference/import.html#the-module-cache
# Removal is harder due to Copybara transforms.
# Note that we must delete the entries, not set them to None.
try:
del sys.modules[main_module_name]
except KeyError:
pass
try:
del sys.modules[preview_module_name]
except KeyError:
pass
# * Verifying that importing `vertexai` does not import the `preview` module.
import vertexai
assert preview_module_name not in sys.modules
# * Also verifying that the `preview` attribute does not exist on the module,
# because if the attribute exists, then accessing `preview` will
# skip `__getattr__` (and importing).
# Important: We cannot use `hasattr` to check whether the `preview`
# attribute exist since that triggers `__getattr__` which creates the attribute.
# We should use `object.__getattribute__` for checking instead.
with pytest.raises(AttributeError):
object.__getattribute__(vertexai, "preview")
# * Verifying that it's still possible to access `vertexai.preview`
assert dir(vertexai.preview)
# * Verifying that accessing `vertexai.preview` caused the module to be loaded.
assert preview_module_name in sys.modules
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